Improvement in base-burning steam-generators



ALEEED oATcEPoLE, 0E GENEVA, NEW YORK.

IMPROVEMENT IN BASE-BURNING STEAM-GENERATORS.

Specification forming part of Letters Patent No. 122,360, dated January2, 1872.

SPEorErcATIoN.

Be it known that I, ALFRED CATcHPoLE, of Geneva, inthe county of Ontarioand State of New York, have invented certain Improvements inSteam-Generators, of which the following is a speciiication:

My invention relates to a generator for heating buildings or otherpurposes in which a central coal-reservoir is used; and it consistsmainly in anovel construction oi' this reservoir and its arrangement andconnection with the other parts of the boiler, and also in a circulatingapparatus.

Figure 1 in the drawing is a vertical section of my boiler. Fig. 2 is aninverted plan view. Fig. is a transverse section at the dotted line w,Fig. l. i

A represents the shell of an ordinary vertical tubular boiler, havingtire-,box B, smoke-tubes a. al, and furnace door b. C isacoal-reservoir,

centrally located within the boiler and terminating in a passage, D,through which coal is introduced and which extends outward and connectswith the shell A to complete the water and steam space of the boiler.The lower extremity of the reservoir C extends downward into thefire-box B, as indicated in Fig. l, and for the purpose of protecting itfrom destruction by the heat, I surround it with a water-v space, d,which is a continuance ofV the waterspace of the boiler.Circulating-tubes e, Fig. 2, connect this water-space with theWaterspace d around the nre-box. By this construction thecoal-reservoir, being entirely surrounded by water, cannot be burnedout, and a constant circulation of water is established in the boiler onaccount of the speedy formation ot' steam inthe water-space d," which,rising to the upper part of the boiler, induces a current of Waterthrough the tubes e from the body of the boiler and water-space d. Thecoal-reservoir is covered by a slide, f, which prevents a draughtthrough the former, and which is provided with a handle, g, accessiblethrough the passage D. The hre-tubes al, Figs. 1 and 3, insteadofextending to the upper sheet of the boiler oommunicate with thepassage D, and other tubes but the tubes al are covered. By this means.V

gases and iiame are prevented from rising into the passage D andescaping into the room, and coal from dropping through said tubes when-the reservoir is being lled but when the slide is pushed over thereservoir the tubes al and o2 establish a draught through the passage D,conveying away gases or smoke therefrom and any that may rise from thereservoir C to the chimney. By attaching a regulating-damper, m, overthe passage D cold air maybe admitted when desired and the formation ofSteam in the boiler and the draught ofthe iire checked. It will be seenthat the chamber or passage l) aiiords additional heating surface,which, by the arrangement of theA tubes al and a2, becomes available ingenerating steam. What I claim isy 1. The arrangement, within a verticaltubular boiler, of a coal-reservoir, C, communicating with the fire-boxat the base and with the passage D at the upper end for the introductionof coal, said passage being provided with tubes a2, substantially asdescribed.

- 2. The water-space d. around that Vportion of the coal-reservoirprojecting into the furnace for the purposes set forth. r

3. The circulating-tubes e, in combination rwith the water-spaces d. andd, operating sub-V stantially as described.

4. In combination with the passage D, the fire-tubes al audaz, arrangedto operate sub tially as herein set forth.

5. In combination with the reservoir C, chamber D, and lire-tubes a1 anda?, the slide f, arranged to cover either the reservoir or tubes alwhen-the other is uncovered, for the purposes set forth.

A. CATCHPOLE. Witnesses:

J oHN E. BEAN, JAMES BRENNAN. (14.8)

PATENT OEErcE.V

